#!/bin/bash
#
# generates an 8 bit color table (256 colors) for
# reference purposes, using the \033[48;5;${val}m
# ANSI CSI+SGR (see "ANSI Code" on Wikipedia)
#
echo -en "\n   +  "
for i in {0..35}; do
  printf "%2b " $i
done

printf "\n\n %3b  " 0
for i in {0..15}; do
  echo -en "\033[48;5;${i}m  \033[m "
done

#for i in 16 52 88 124 160 196 232; do
for i in {0..6}; do
  let "i = i*36 +16"
  printf "\n\n %3b  " $i
  for j in {0..35}; do
    let "val = i+j"
    echo -en "\033[48;5;${val}m  \033[m "
  done
done

echo -e "\n"